Execute data modification operations (INSERT/UPDATE/DELETE/UPSERT) - operation="insert/update/delete/upsert" with table and data. Examples: operation="insert", table="users", data={"name":"John","email":"john@example.com"}
Part of the PostgreSQL Database Management Server server.
Free to start. No card required.
AI agents invoke pg_execute_mutation to trigger processes or run actions in PostgreSQL Database Management Server. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
pg_execute_mutation can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"pg_execute_mutation": {
"limits": [
{
"counter": "pg_execute_mutation_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full PostgreSQL Database Management Server policy for all 18 tools.
These attack patterns abuse exactly the kind of access pg_execute_mutation gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Execute data modification operations (INSERT/UPDATE/DELETE/UPSERT) - operation="insert/update/delete/upsert" with table and data. Examples: operation="insert", table="users", data={"name":"John","email":"john@example.com"}. It is categorised as a Execute tool in the PostgreSQL Database Management Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the PostgreSQL Database Management Server MCP server in PolicyLayer and add a rule for pg_execute_mutation: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches PostgreSQL Database Management Server. Nothing to install.
pg_execute_mutation is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the pg_execute_mutation rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for pg_execute_mutation. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
pg_execute_mutation is provided by the PostgreSQL Database Management Server MCP server (HenkDz/postgresql-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 18 PostgreSQL Database Management Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.